Each person on a team brings a unique perspective to the process; i.e., how things work; what happens when changes are made, and how to sustain improvements during daily work. Contributions are made from each individual's skill set and the team's synthesis of ideas.
Division of labor is the economic term for the practice of assigning small parts of a complicated job to individual workers who specialize in doing just their small part.
The headstrong act; the obstinate and stubborn may simply refuse to stir. The most amiable person may be obstinate on some one point; the stubborn person is for the most part habitually so; we speak of obstinate determination, stubborn resistance. Stubborn is the term most frequently applied to the lower animals and inanimate things.